function setCookie (name, value) {
  var argv = setCookie.arguments;
  var argc = setCookie.arguments.length;
  var expires = (argc > 2) ? argv[2] : null;
  var path = (argc > 3) ? argv[3] : null;
  var domain = (argc > 4) ? argv[4] : null;
  var secure = (argc > 5) ? argv[5] : false;
  document.cookie = name + "=" + escape (value) +
  ((expires == null) ? "" : ("; expires=" + expires)) +
  ((path == null) ? "" : ("; path=" + path)) +
  ((domain == null) ? "" : ("; domain=" + domain)) +
  ((secure == true) ? "; secure" : "");
}
   

   if (document.referrer.indexOf("craigslist") != -1)  {
      setCookie("SID","CL",'01/01/2009',"/");
   }
   if (document.referrer.indexOf("sportsenter") != -1)  {
      setCookie("SID","SC",'01/01/2009',"/");
   }
   if (document.referrer.indexOf("backpage") != -1)  {
      setCookie("SID","BP",'01/01/2009',"/");
   }